Facebook recently announced a new Metrics and Visualizations section for developers.
Facebook Application Developers will now have access to more detailed stats about their public applications performance. This new feature will display stats on user actions including canvas page views, clicks on profile boxes, confirmation of feed forms, and the adding and removing of bookmarks.
The analytics will also help show trends in your data with a graphical report. Custom date range reports can also be viewed.
This new feature will help Facebook Application Developers to visualize application growth, gauge user response, and ultimately build a better user experience.